The DS-HSG80-BJ Controller, FC, 256MB Cache 11 operating system is a single-user, realtime operating system designed - for interactive program development of online application execution on Profes- sional 300 Series, DS-HSG80-BJ Controller, FC, 256MB Cache 11 and LSI based systems. Although it is a single-user - system, RT 11 supports both single job (SJ) and foreground/background (FB/XM) - modes of processing, as well as a number of system jobs. In addition to a variety of system and program utilities, DS-HSG80-BJ Controller, FC, 256MB Cache-11 supports a number of high-level language processors including DS-HSG80-BJ Controller, FC, 256MB Cache PLUS and DS-HSG80-BJ Controller, FC, 256MB Cache 77. - - The emphasis in RT-11 is on efficient use of system resources, minimizing system requirements in the DS-HSG80-BJ Controller, FC, 256MB Cache and on the mass-storage devices, while maxi- mizing system throughput. The RT 11 operating system offers the following - configurations: